help with 5/8's plate ,v-groove 1/8 landing hard wire test

i've taken a vertical , horizontal twice. I pushed and pulled the first two test . I'm hoping for a third test soon. I need any advice on this test!!

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1/8 land seems way too much. 1/16 is more like it.

if 1/8 is required, you are going to have to run the root way hotter than normal...like 20 volts